Extendable level

Abstract

A new level having a very rigid and rugged construction in the form of solid blocks between four track members that guide the relative movement of the level frame and level extension. The track members and extension provide planar surfaces the length of the extended level on the top and bottom. The extension includes handgrips to assist in both extending and using the level. As an option, a rotatable spirit vial is located in the extension. The rotatable spirit vial may be set for any angular degree between the horizontal and the vertical. Thus, angular pitches may be accurately determined with as much ease as the horizontal or vertical.

What is claimed is:  
     
       1. An extendable level comprising a frame and an extension in telescopic engagement with the frame, the frame including a plurality of track members and a block permanently affixed to the track members and the extension including a solid piece and a plurality of plates affixed to the solid piece, said solid piece being substantially wider than said plates, 
       a plurality of parallel channels formed in the solid piece adjacent and beyond the plates, said channels extending beneath at least portions of said plates,  
       and said track members shaped to partially fit into said channels and over the solid piece with portions of said track members extending beneath portions of said plates.  
     
     
       2. The extendable level of  claim 1  including a first aperture formed in the block, the aperture being fitted with a first spirit vial. 
     
     
       3. The extendable level of  claim 1  including a second aperture formed in the solid piece, the second aperture being fitted with a second spirit vial, and a third aperture formed in the solid piece, the third aperture being fitted with a third spirit vial in a direction perpendicular to the second spirit vial. 
     
     
       4. The extendable level of  claim 1  wherein each plate is located between two track members, the outer surface of each plate being coincident with a plane formed by adjacent outer surfaces of adjacent track members.